[PATCH 07/18] drm/amdgpu: handle multi level PD in the LRU

[David1.Zhou@xxxxxxx (Chunming Zhou)]

From: Christian König <christian.koenig@xxxxxxx>

Move all levels to the end after command submission.

Change-Id: I6d41aac90be29476780b897cf5943a2261580a78
Signed-off-by: Christian König <christian.koenig at amd.com>
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 36 +++++++++++++++++++++++++---------
 1 file changed, 27 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 23674ed..fe3db17 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -199,28 +199,46 @@ int amdgpu_vm_validate_pt_bos(struct amdgpu_device *adev, struct amdgpu_vm *vm,
 }
 
 /**
- * amdgpu_vm_move_pt_bos_in_lru - move the PT BOs to the LRU tail
+ * amdgpu_vm_move_level_in_lru - move one level of PT BOs to the LRU tail
  *
  * @adev: amdgpu device instance
  * @vm: vm providing the BOs
  *
  * Move the PT BOs to the tail of the LRU.
  */
-void amdgpu_vm_move_pt_bos_in_lru(struct amdgpu_device *adev,
-				  struct amdgpu_vm *vm)
+static void amdgpu_vm_move_level_in_lru(struct amdgpu_vm_pt *parent)
 {
-	struct ttm_bo_global *glob = adev->mman.bdev.glob;
 	unsigned i;
 
-	spin_lock(&glob->lru_lock);
-	for (i = 0; i <= vm->root.last_entry_used; ++i) {
-		struct amdgpu_bo *bo = vm->root.entries[i].bo;
+	if (!parent->entries)
+		return;
 
-		if (!bo)
+	for (i = 0; i <= parent->last_entry_used; ++i) {
+		struct amdgpu_vm_pt *entry = &parent->entries[i];
+
+		if (!entry->bo)
 			continue;
 
-		ttm_bo_move_to_lru_tail(&bo->tbo);
+		ttm_bo_move_to_lru_tail(&entry->bo->tbo);
+		amdgpu_vm_move_level_in_lru(entry);
 	}
+}
+
+/**
+ * amdgpu_vm_move_pt_bos_in_lru - move the PT BOs to the LRU tail
+ *
+ * @adev: amdgpu device instance
+ * @vm: vm providing the BOs
+ *
+ * Move the PT BOs to the tail of the LRU.
+ */
+void amdgpu_vm_move_pt_bos_in_lru(struct amdgpu_device *adev,
+				  struct amdgpu_vm *vm)
+{
+	struct ttm_bo_global *glob = adev->mman.bdev.glob;
+
+	spin_lock(&glob->lru_lock);
+	amdgpu_vm_move_level_in_lru(&vm->root);
 	spin_unlock(&glob->lru_lock);
 }
 
-- 
1.9.1